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Wireless power transmission device

一种电力传输、非接触的技术，应用在电路装置、电池电路装置、电路认证等方向，能够解决异物加热等问题

Active Publication Date: 2015-12-02
PANASONIC INTPROP MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In power supply equipment, if power supply operation is performed in the presence of foreign objects, the foreign objects may be heated

Method used

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Examples

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Embodiment Construction

[0031] An embodiment of a non-contact power transmission device will now be described with reference to the drawings.

[0032] figure 1 is an overall perspective view showing a non-contact power transmission device (hereinafter referred to as power supply device) 1 and electric equipment (hereinafter referred to as equipment) E to which power is supplied from power supply device 1 in a contactless manner.

[0033] The power supply device 1 includes a rectangular substantially plate-shaped housing 2 . The housing 2 includes a placement surface 3 on which the device E is placed. The placement surface 3 is a plane. The placement surface 3 is divided, for example, into a plurality of quadrangular power supply regions AR. In this embodiment, 24 feeding regions AR are formed in 4 columns (horizontal direction) and 6 rows (vertical direction).

[0034] Such as figure 2 As shown, the primary coil L1 is arranged in the housing 2 at a position corresponding to each feeding area A...

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Abstract

A wireless power transmission device comprises: a detection coil (L1) and a capacitor (C1) constituting a resonance circuit; and an oscillation circuit (21, 22) for exciting the detection coil with a high-frequency current. The oscillation circuit can generate the high-frequency current in accordance with a detection frequency for detecting the presence of an electric device and a metal. The wireless power transmission device further comprises: an output detection circuit (24) for generating output voltage (Vs) in accordance with the excitation current flowing through the detection coil (L1); a presence detection circuit (12) for detecting the presence of the electric device and the metal on the basis of the output voltage (Vs) obtained by exciting the detection coil (L1) with a high-frequency current having the detection frequency; and a detection condition changing circuit (12) capable of executing an initial value setting mode for changing a detection condition of the presence detection circuit in accordance with the resonance characteristics determined by the detection coil (L1) and the capacitor (C1).

Description

technical field [0001] The present invention relates to a non-contact power transmission device. Background technique [0002] As a non-contact power transmission device, Patent Document 1 discloses a non-contact power supply device that detects displacement of electric equipment to be fed from a power factor of power supplied from a primary side resonance circuit. The power supply device adjusts the characteristics of the primary-side resonance circuit based on the power factor to suppress a drop in power supply efficiency in the event of displacement. [0003] In a power supply device, if a power supply operation is performed in the presence of a foreign object, the foreign object may be heated. Therefore, it is desirable to detect the foreign matter to stop the power supply operation. [0004] Patent Document 2 discloses a non-contact type power supply device including a detection coil for detecting metal in addition to a primary coil for power supply. The power supply...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J17/00
CPCH02J17/00H02J7/025H02J50/12H02J50/90H02J7/00045H02J50/402H02J50/60H02J50/80
Inventor 小原弘士尾崎保辻本丰彦
Owner PANASONIC INTPROP MANAGEMENT CO LTD
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